<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>

<body>
    <div id="test"></div>
    <script src="./js/react.development.js"></script>
    <script src="./js/react-dom.development.js"></script>
    <script src="./js/babel.min.js"></script>
    <script type="text/babel">
        class Demo extends React.Component {
            //展示左侧输入框的数据
            showData1 = () => {
                const { input1 } = this
                alert(input1.value)
            }

            //展示右侧输入框的数据
            showData2 = () => {
                const { input2 } = this
                alert(input2.value)
            }

            render() {
                return (
                    <div>
                        <input ref={(currentNode) => { this.input1 = currentNode }} type="text" placeholder="点击按钮提示数据" />
                        <button onClick={this.showData1}>点击提示左侧数据</button>
                        <input onBlur={this.showData2} ref={(currentNode) => { this.input2 = currentNode }} type="text" placeholder="失去焦点提示数据" />
                    </div>
                )
            }
        }
        ReactDOM.render(<Demo />, document.getElementById('test')) 
    </script>
</body>

</html>